JPH0832515A - Transmission power control method and communication equipment using the same - Google Patents

Transmission power control method and communication equipment using the same

Info

Publication number
JPH0832515A
JPH0832515A JP7793795A JP7793795A JPH0832515A JP H0832515 A JPH0832515 A JP H0832515A JP 7793795 A JP7793795 A JP 7793795A JP 7793795 A JP7793795 A JP 7793795A JP H0832515 A JPH0832515 A JP H0832515A
Authority
JP
Japan
Prior art keywords
transmission power
mobile station
power
power control
control bit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7793795A
Other languages
Japanese (ja)
Other versions
JP2993554B2 (en
Inventor
Mamoru Sawahashi
衛 佐和橋
Shigemi Umeda
成視 梅田
Toshihiro Doi
智弘 土肥
Hiroshi Ono
公士 大野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26418990&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH0832515(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7077937A priority Critical patent/JP2993554B2/en
Priority to CA 2149095 priority patent/CA2149095C/en
Priority to KR1019950011473A priority patent/KR0143837B1/en
Priority to CNB001259881A priority patent/CN1187908C/en
Priority to CN95105384A priority patent/CN1082771C/en
Priority to US08/439,302 priority patent/US5566165A/en
Priority to EP19950303222 priority patent/EP0682418B9/en
Priority to DE1995633818 priority patent/DE69533818T3/en
Publication of JPH0832515A publication Critical patent/JPH0832515A/en
Publication of JP2993554B2 publication Critical patent/JP2993554B2/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/248—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where transmission power control commands are generated based on a path parameter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To prevent a transmission amplifier of a mobile station from being divergent into a maximum transmission power in the control process by providing an upper limit to the maximum transmission power of the mobile station so that required quality is satisfied for a base station with respect to the maximum transmission power of the system. CONSTITUTION:A radio equipment of a base station controls transmission power of a mobile station so that a ratio of a desired wave reception signal power S from a mobile station making talking to the sum of thermal noise and an interference signal power I from other mobile station satisfies required reception quality. The period of the power control is selected to be less than a period at which instantaneous fluctuation in response to a Doppler frequency is traced. When a level of an interference signal is increased, the transmission power PT of the mobile station is increased to reach a mobile station maximum transmission power Pmax depending on the extension subscriber capacity of the system, cell diameter and a location rate, the power is fixed at the power Pmax for the transmission. Thus, the transmission power of the mobile station is not increased over the maximum transmission power Pmax corresponding to a maximum signal level Smax of the base station.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、送信電力制御法および
前記送信電力制御法を用いた通信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission power control method and a communication device using the transmission power control method.

【０００２】更に詳しくは、本発明は、移動通信におい
てスペクトル拡散を用いてマルチプルアクセスを行なう
ＣＤＭＡ（Ｃｏｄｅ Ｄｉｖｉｓｉｏｎ Ｍｕｌｔｉｐ
ｌｅＡｃｃｅｓｓ：符号分割多元接続）方式における送
信電力制御法および前記送信電力制御法を用いた通信装
置に関する。[0002] More specifically, the present invention is a CDMA (Code Division Multiple) which performs multiple access using spread spectrum in mobile communication.
The present invention relates to a transmission power control method in a leAccess (code division multiple access) system and a communication device using the transmission power control method.

【０００３】[0003]

【従来の技術】ＣＤＭＡ伝送は、周知のように従来の変
調信号を高速レートの拡散符号で拡散する直接拡散（Ｄ
Ｓ：Ｄｉｒｅｃｔ Ｓｅｑｕｅｎｃｅ）方式と、周波数
ホッピング（ＦＨ：Ｆｒｅｑｕｅｎｃｙ Ｈｏｐｐｉｎ
ｇ）方式に分類できる。ＦＨ方式では１シンボルをチッ
プと呼ばれる単位に分解して、チップ毎に異なる中心周
波数の信号に高速に切り替える必要があり、装置の実現
性が困難であるため、通常はＤＳ方式が用いられる。ス
ペクトル拡散（ＳＳ：Ｓｐｒｅａｄ Ｓｐｅｃｔｒｕ
ｍ）の無線機では、衛星データ網の通話路方式として知
られているＳＣＰＣ（Ｓｉｎｇｌｅ Ｃｈａｎｎｅｌ
Ｐｅｒ Ｃａｒｒｉｅｒ：１チャンネルに１キャリア専
有）／ＦＤＭＡ（Ｆｒｅｑｕｅｎｃｙ Ｄｉｖｉｓｉｏ
ｎ Ｍｕｌｔｉｐｌｅ Ａｃｃｅｓｓ：周波数分割多元
接続）方式あるいはＴＤＭＡ（Ｔｉｍｅ Ｄｉｖｉｓｉ
ｏｎ Ｍｕｌｔｉｐｌｅ Ａｃｃｅｓｓ：時分割多元接
続）方式の無線機に比較して、送信側では通常の変調の
後に拡散符号で２次変調を行ない、信号帯域を拡散して
伝送する。受信側では、まず広帯域の受信入力信号を逆
拡散という過程で元の狭帯域の信号に戻してから、従来
の復調処理を行なう。この受信側の逆拡散という過程に
おいて、受信信号の拡散系列と受信局が発生するチャネ
ル固有の拡散系列との相関検出を行なう。ＣＤＭＡでは
同一の周波数帯を用いるため、所要の誤り率を得るのに
必要なＳＩＲ（希望波受信信号電力対干渉電力比）でセ
ル内の加入者容量が決まる。2. Description of the Related Art As is well known, CDMA transmission is direct spread (D) in which a conventional modulated signal is spread by a high-rate spreading code.
S: Direct Sequence) method and frequency hopping (FH: Frequency Hoppin)
g) It can be classified into the method. In the FH method, it is necessary to decompose one symbol into a unit called a chip and switch to a signal having a different center frequency for each chip at high speed, which makes it difficult to implement the device. Therefore, the DS method is usually used. Spread spectrum (SS: Spread Specru)
m), the wireless device of the mPC) is known as an SCPC (Single Channel) which is known as a communication path system of a satellite data network.
Per Carrier: 1 carrier is dedicated to 1 channel / FDMA (Frequency Divisio)
n Multiple Access (Frequency Division Multiple Access) method or TDMA (Time Divisi)
Compared to a wireless device of the on multiple access (time division multiple access) system, the transmitting side performs secondary modulation with a spreading code after normal modulation, and spreads the signal band for transmission. On the receiving side, first, the wideband received input signal is restored to the original narrowband signal in the process of despreading, and then the conventional demodulation processing is performed. In the process of despreading on the receiving side, the correlation between the spreading sequence of the received signal and the channel-specific spreading sequence generated by the receiving station is detected. Since the same frequency band is used in CDMA, the subscriber capacity in the cell is determined by the SIR (desired wave received signal power to interference power ratio) required to obtain the required error rate.

【０００４】移動通信にＣＤＭＡ方式を適用する場合の
問題点は、移動局の所在位置によって、基地局での、各
移動局からの受信信号レベルが大きく異なり、電力の大
きな信号が電力の小さな信号を干渉してマスクする「遠
近問題」が生じることである。これは多重局数の減少に
つながる。ＣＤＭＡ方式では、同一の周波数帯域を複数
の通信者が共有するために、他の通信者の信号が干渉信
号となって自分のチャネルの通信品質を劣化させる。The problem in applying the CDMA system to mobile communication is that the received signal level from each mobile station at the base station greatly differs depending on the location of the mobile station, and a high power signal is a low power signal. That is, there is a "far-and-far problem" that interferes with and masks. This leads to a reduction in the number of multiple stations. In the CDMA system, since the same frequency band is shared by a plurality of communicators, the signal of another communicator becomes an interference signal and deteriorates the communication quality of its own channel.

【０００５】図１に上り（移動局から基地局）回線にお
ける他の移動局からの干渉の状態を示す。ＢＳ１〜ＢＳ
３は基地局、ＭＳ１〜ＭＳ３は基地局ＢＳ１のセル内の
移動局を示す。基地局ＢＳ１の近くの移動局ＭＳ１と遠
くの移動局ＭＳ２が同時に通信を行なう場合、基地局Ｂ
Ｓ１では近くの移動局ＭＳ１からの信号電力は大きく受
信されるのに対して、遠くの移動局ＭＳ２からの受信電
力は小さく受信される。従って、遠くの移動局ＭＳ２と
基地局ＢＳ１との通信が、近くの移動局ＭＳ１からの干
渉を受けて大きく特性が劣化することになる。FIG. 1 shows a state of interference from another mobile station in an uplink (mobile station to base station) line. BS1 to BS
Reference numeral 3 denotes a base station, and MS1 to MS3 denote mobile stations in the cell of the base station BS1. When the mobile station MS1 near the base station BS1 and the mobile station MS2 far from the base station BS1 simultaneously communicate with each other, the base station B
In S1, a large signal power is received from the near mobile station MS1, whereas a small received power is received from the far mobile station MS2. Therefore, the characteristics of the communication between the distant mobile station MS2 and the base station BS1 are greatly deteriorated due to the interference from the nearby mobile station MS1.

【０００６】この遠近問題を解決する技術として、従来
から送信電力制御が検討されてきた。送信電力制御は、
受信局が受信する受信電力、またはその受信電力から決
まる希望波受信信号電力対干渉電力比（ＳＩＲ）が、移
動局の所在位置によらず一定になるように制御するもの
で、これによってサービスエリア内で均一の通信品質が
得られることになる。Transmission power control has been conventionally studied as a technique for solving the near-far problem. Transmit power control is
The received power received by the receiving station, or the desired signal received signal power to interference power ratio (SIR) determined by the received power, is controlled to be constant regardless of the location of the mobile station. In this way, uniform communication quality can be obtained.

【０００７】図２に、上り送信電力制御した場合の基地
局受信信号レベルを示す。なお、隣接セルとの境界付近
の移動局は、隣接セルからの干渉も受けることになるか
ら、この遠近問題に起因する通信品質の劣化は、上り、
下りの両方の通信で発生することになる。FIG. 2 shows the base station reception signal level when the uplink transmission power is controlled. Note that mobile stations near the boundary with the adjacent cell will also receive interference from the adjacent cell, so the deterioration of communication quality due to this near-far problem is upstream,
It will occur in both downlink communications.

【０００８】図３に、移動局ＭＳ３に関する下り回線に
おける他のセル（ＢＳ２，ＢＳ３）からの干渉状態を示
す。他の通信者の信号電力は干渉信号となるため、他の
通信者の信号電力が自チャネルの送信電力より大幅に大
きくならない様に、送信電力制御を行なう必要がある。FIG. 3 shows an interference state from another cell (BS2, BS3) in the downlink for the mobile station MS3. Since the signal powers of other correspondents become interference signals, it is necessary to perform transmission power control so that the signal powers of other correspondents do not become significantly higher than the transmission power of the own channel.

【０００９】特に、上りチャネルに対しては、基地局の
受信入力において、各移動局からの送信電力が一定にな
るように、各移動局は送信電力の調整を行なう。この送
信電力の誤差は、干渉電力白色化のＣＤＭＡ方式におい
ては、１セル当たりの加入者容量を決める最も重要なフ
ァクタである。例えば、１ｄＢの送信電力誤差がある
と、加入者容量は３割程度減少する。In particular, for the uplink channel, each mobile station adjusts the transmission power so that the transmission power from each mobile station becomes constant at the reception input of the base station. This transmission power error is the most important factor that determines the subscriber capacity per cell in the interference power whitening CDMA system. For example, if there is a transmission power error of 1 dB, the subscriber capacity will decrease by about 30%.

【００１０】下りチャネルに関しては、自チャネルの信
号も、他のユーザへの信号も、同一の搬送路を通って、
所定の移動局に到達するため、他のユーザへの信号、す
なわち自チャネルへの干渉信号も、自チャネルの信号と
同一の、長区間変動、短区間変動、瞬時変動等の変動を
する。したがって、希望波信号電力対干渉信号電力比は
常に一定である。このため、同一セルの干渉のみを扱う
場合には、送信電力制御は必要ない。しかし、他セルか
らの干渉も考慮しなければならない。他セルからの干渉
電力は、セル内の干渉電力と等しくレイリーフェージン
グによる瞬時変動をするが、自局希望波信号と同じ変動
はしない。Regarding the downlink channel, the signal of its own channel and the signals to other users pass through the same carrier path,
In order to reach a predetermined mobile station, a signal to another user, that is, an interference signal to its own channel also undergoes the same long-term variation, short-term variation, instantaneous variation, etc. as the signal of its own channel. Therefore, the desired signal power to interference signal power ratio is always constant. Therefore, when only interference of the same cell is handled, transmission power control is not necessary. However, interference from other cells must also be considered. The interference power from the other cell is equal to the interference power in the cell and instantaneously fluctuates due to Rayleigh fading, but does not fluctuate the same as the own station desired wave signal.

【００１１】図４に、移動局における受信信号の状態例
を示す。米国ＴＩＡで標準化されたＣＤＭＡシステムで
は、下り送信電力制御は基本的に行なわず、基地局がフ
レーム誤りを検出し、この誤りの値が所定の値よりも大
きくなれば、その移動局に対する送信電力を上げる方法
をとっている。大幅に送信電力を上げると、他セルへの
干渉の増大になるためである。しかし、他セルの基地局
からの送信電力は、自分のチャネルに対して、瞬時変動
する干渉信号となる。FIG. 4 shows an example of the state of the received signal at the mobile station. In the CDMA system standardized by the US TIA, the downlink transmission power control is basically not performed, and when the base station detects a frame error and the value of this error becomes larger than a predetermined value, the transmission power for the mobile station is I'm taking a way to raise it. This is because if the transmission power is increased significantly, interference with other cells will increase. However, the transmission power from the base stations of other cells becomes an interference signal that fluctuates instantaneously with respect to its own channel.

【００１２】[0012]

【発明が解決しようとする課題】図５に、受信ＳＩＲに
応じてクローズドループの送信電力制御を行なう第１の
従来方法の動作原理を示す。図５中、Ｓは希望波受信信
号、Ｉは干渉信号、ｐｇは拡散率を示す（図６も同
様）。このＣＤＭＡの送信電力制御は、実際のＳＩＲ
が、所要の品質を得るためのＳＩＲと一致するように行
われる。ここで、ＳＩＲは、熱雑音と当該無線機で通話
している通信者の信号以外の干渉信号との和に対する希
望波受信信号レベルの比である。所要の品質をえるため
のＳＩＲになるように送信電力制御を行なうと、自分の
受信信号レベルを上げることにより他の通信者への干渉
電力も増え、この動作の繰り返しで結局、移動局からの
送信電力を次々と上げることになり、移動局は最大送信
電力で送信することになる。FIG. 5 shows the operating principle of the first conventional method for controlling the transmission power of the closed loop according to the reception SIR. In FIG. 5, S is the desired wave reception signal, I is the interference signal, and pg is the spreading factor (same for FIG. 6). This CDMA transmission power control is based on the actual SIR.
Is performed so as to match the SIR for obtaining the required quality. Here, the SIR is the ratio of the desired wave reception signal level to the sum of the thermal noise and the interference signal other than the signal of the person communicating with the radio. When the transmission power control is performed so as to obtain the SIR for obtaining the required quality, interference power to other communication parties also increases by increasing the reception signal level of itself, and by repeating this operation, the mobile station eventually The transmission power will be increased one after another, and the mobile station will transmit at the maximum transmission power.

【００１３】図６に、受信熱雑音レベルに対してクロー
ズドループの送信電力制御を行なう従来の第２の方法の
動作原理を示す。この送信電力制御は、システムの最大
収容ユーザ数からの干渉電力Ｉmax と熱雑音Ｎとの和に
対する希望波受信信号レベルＳの比Ｓ／（Ｉmax ＋Ｎ）
で、つまり熱雑音レベルからの絶対レベルの比で行われ
る。このような場合には、セル内の通信者数が最大容量
に満たない場合でも、常に最大加入者がいると仮定した
場合に、基地局受信で所要の受信品質を保証するような
送信電力で送信することになる（ＳＮＲは後述する）。FIG. 6 shows the operating principle of the second conventional method for controlling the transmission power of the closed loop with respect to the received thermal noise level. This transmission power control is performed by the ratio S / (Imax + N) of the desired wave reception signal level S to the sum of the interference power Imax from the maximum number of users accommodated in the system and the thermal noise N.
, That is, the ratio of the absolute level to the thermal noise level. In such a case, even if the number of communicators in the cell is less than the maximum capacity, it is assumed that there is always a maximum number of subscribers, and the transmission power is assured to guarantee the required reception quality at the base station reception. Will be transmitted (SNR will be described later).

【００１４】従って、図５および図６の、いずれの場合
も、移動局は、常にシステムの最大容量に対応した送信
電力を出すことになり、移動局回路は余分な消費電力を
消費することになる。下りの基地局送信に対しても同様
である。Therefore, in both cases of FIG. 5 and FIG. 6, the mobile station always outputs the transmission power corresponding to the maximum capacity of the system, and the mobile station circuit consumes the extra power consumption. Become. The same applies to downlink base station transmission.

【００１５】本発明の目的は、基本的には他の通信者か
らの電力に対する、希望波受信信号レベルの比で送信電
力を制御し、しかも、送信増幅器の最大出力電力に発散
することのない送信電力制御法および当該方法を用いた
通信装置を提供することにある。The object of the present invention is basically to control the transmission power by the ratio of the desired wave reception signal level to the power from other correspondents, and yet not diverge to the maximum output power of the transmission amplifier. It is to provide a transmission power control method and a communication device using the method.

【００１６】[0016]

【課題を解決するための手段】上記目的を達成するため
に、請求項１に記載の発明は、スペクトル拡散を用いて
マルチプルアクセスを行なう符号分割多元接続方式の送
信電力制御法において、基地局において、通信を行なっ
ている移動局からの希望波信号受信電力と、他の局から
の干渉電力および熱雑音電力の和との比である第１の実
際のＳＩＲを計算し、当該第１の実際のＳＩＲが、所要
の品質を満たすための第１の所定のＳＩＲに対して大き
いか、小さいかを判定し、当該判定結果に基づいて第１
の送信電力制御ビットを生成し、該第１の送信電力制御
ビットを下りフレーム内に周期的に挿入し、移動局にお
いて、前記基地局からの下りフレーム内の前記第１の送
信電力制御ビットに応じて仮上り送信電力を計算し、当
該計算した仮上り送信電力が、予め設定した第１の最大
送信電力よりも小さい場合には、前記計算した仮上り送
信電力を上り送信電力とし、逆の場合には前記第１の最
大送信電力を上り送信電力とし、該上り送信電力で信号
を送信することを特徴とする。In order to achieve the above-mentioned object, the invention according to claim 1 is a transmission power control method of a code division multiple access system for performing multiple access using spread spectrum, in a base station. , A first actual SIR, which is a ratio of the desired wave signal reception power from the mobile station communicating with the sum of interference power and thermal noise power from other stations, and calculates the first actual SIR. Of the first SIR for satisfying the required quality is determined to be larger or smaller than the first predetermined SIR, and the first SIR is determined based on the determination result.
Of the transmission power control bits, the first transmission power control bits are periodically inserted in the downlink frame, and the mobile station uses the first transmission power control bit in the downlink frame from the base station as the first transmission power control bit. According to the calculation, the provisional uplink transmission power is calculated, and when the calculated provisional uplink transmission power is smaller than the preset first maximum transmission power, the calculated provisional uplink transmission power is set as the uplink transmission power, and In this case, the first maximum transmission power is the upstream transmission power, and the signal is transmitted at the upstream transmission power.

【００１７】請求項２に記載の発明は、スペクトル拡散
を用いてマルチプルアクセスを行なう符号分割多元接続
方式の送信電力制御法において、移動局において、通信
を行なっている基地局からの希望波信号受信電力と、他
の局からの干渉電力および熱雑音電力の和との比である
実際のＳＩＲを計算し、当該実際のＳＩＲが、所要の品
質を満たすための所定のＳＩＲに対して大きいか、小さ
いかを判定し、当該判定結果に基づいて送信電力制御ビ
ットを生成し、該送信電力制御ビットを上りフレーム内
に周期的に挿入し、基地局において、前記移動局からの
上りフレーム内の前記送信電力制御ビットに応じて仮下
り送信電力を計算し、当該計算した仮下り送信電力が、
予め設定した最大送信電力よりも小さい場合には、前記
計算した仮下り送信電力を下り送信電力とし、逆の場合
には前記最大送信電力を下り送信電力とし、該下り送信
電力で信号を送信することを特徴とする。According to a second aspect of the present invention, in a transmission power control method of a code division multiple access system for performing multiple access using spread spectrum, a mobile station receives a desired wave signal from a base station with which communication is performed. Calculate the actual SIR, which is the ratio of the power to the sum of the interference and thermal noise powers from other stations, and if the actual SIR is greater than a given SIR to meet the required quality, It is determined whether it is small, a transmission power control bit is generated based on the determination result, the transmission power control bit is periodically inserted in the upstream frame, and the base station is configured to transmit the transmission power control bit in the upstream frame from the mobile station. The temporary downlink transmission power is calculated according to the transmission power control bit, and the calculated temporary downlink transmission power is
When it is smaller than the preset maximum transmission power, the calculated provisional downlink transmission power is set as the downlink transmission power, and in the opposite case, the maximum transmission power is set as the downlink transmission power, and the signal is transmitted at the downlink transmission power. It is characterized by

【００１８】請求項３に記載の発明は、請求項１または
２において、前記最大送信電力は、セル当りの最大加入
者容量、セル半径および場所率に基づいて設定すること
を特徴とする。According to a third aspect of the present invention, in the first or second aspect, the maximum transmission power is set based on the maximum subscriber capacity per cell, the cell radius and the location rate.

【００１９】請求項４に記載の発明は、請求項１におい
て、移動局において、通信を行なっている基地局からの
希望波信号受信電力と、他の局からの干渉電力および熱
雑音電力の和との比である第２の実際のＳＩＲを計算
し、当該第２の実際のＳＩＲが、所要の品質を満たすた
めの第２の所定のＳＩＲに対して大きいか、小さいかを
判定し、当該判定結果に基づいて第２の送信電力制御ビ
ットを生成し、該第２の送信電力制御ビットを上りフレ
ーム内に周期的に挿入し、基地局において、前記移動局
からの上りフレーム内の前記第２の送信電力制御ビット
に応じて仮下り送信電力を計算し、当該計算した仮下り
送信電力が、予め設定した第２の最大送信電力よりも小
さい場合には、前記計算した仮下り送信電力を下り送信
電力とし、逆の場合には前記第２の最大送信電力を下り
送信電力とし、該下り送信電力で信号を送信することを
特徴とする。According to a fourth aspect of the present invention, in the mobile station according to the first aspect, the sum of the desired wave signal reception power from the base station communicating with the mobile station and the interference power and thermal noise power from other stations. And calculating a second actual SIR, which is a ratio of the second and the second actual SIR, and determining whether the second actual SIR is larger or smaller than a second predetermined SIR for satisfying the required quality. A second transmission power control bit is generated based on the determination result, the second transmission power control bit is periodically inserted in the upstream frame, and the base station is configured to perform the second transmission power control bit in the upstream frame from the mobile station. The provisional downlink transmission power is calculated according to the transmission power control bit of No. 2, and when the calculated provisional downlink transmission power is smaller than the preset second maximum transmission power, the calculated provisional downlink transmission power is calculated. Downlink transmission power, and vice versa Is the second maximum transmission power and the downlink transmission power, and transmits a signal in said downlink transmission power.

【００２０】請求項５に記載の発明は、スペクトル拡散
を用いてマルチプルアクセスを行なう符号分割多元接続
方式の通信装置において、基地局において、通信を行な
っている移動局からの希望波信号受信電力と、他の局か
らの干渉電力および熱雑音電力の和との比である第１の
実際のＳＩＲを計算する手段と、当該第１の実際のＳＩ
Ｒが、所要の品質を満たすための第１の所定のＳＩＲに
対して大きいか、小さいかを判定する手段と、当該判定
結果に基づいて第１の送信電力制御ビットを生成する手
段と、該第１の送信電力制御ビットを下りフレーム内に
周期的に挿入する手段と、移動局において、前記基地局
からの下りフレーム内の前記第１の送信電力制御ビット
に応じて仮上り送信電力を計算する手段と、当該計算し
た仮上り送信電力が、予め設定した第１の最大送信電力
よりも小さい場合には、前記計算した仮上り送信電力を
上り送信電力とし、逆の場合には前記第１の最大送信電
力を上り送信電力とする手段と、該上り送信電力で信号
を送信する手段とを具備することを特徴とする。According to a fifth aspect of the present invention, in a code division multiple access system communication apparatus that performs multiple access using spread spectrum, the base station receives desired signal power from a mobile station performing communication. , Means for calculating a first actual SIR, which is the ratio of the sum of the interference power and the thermal noise power from the other station, and the first actual SI.
Means for determining whether R is larger or smaller than a first predetermined SIR for satisfying the required quality; means for generating a first transmission power control bit based on the result of the determination; Means for periodically inserting a first transmission power control bit in a downlink frame, and a mobile station calculating a provisional uplink transmission power in accordance with the first transmission power control bit in the downlink frame from the base station. And the calculated provisional uplink transmission power is smaller than a preset first maximum transmission power, the calculated provisional uplink transmission power is set to the uplink transmission power, and in the opposite case, the first provisional transmission power is calculated. And a means for transmitting a signal with the uplink transmission power.

【００２１】請求項６に記載の発明は、スペクトル拡散
を用いてマルチプルアクセスを行なう符号分割多元接続
方式の通信装置において、移動局において、通信を行な
っている基地局からの希望波信号受信電力と、他の局か
らの干渉電力および熱雑音電力の和との比である実際の
ＳＩＲを計算する手段と、当該実際のＳＩＲが、所要の
品質を満たすための所定のＳＩＲに対して大きいか、小
さいかを判定する手段と、当該判定結果に基づいて送信
電力制御ビットを生成する手段と、該送信電力制御ビッ
トを上りフレーム内に周期的に挿入する手段と、基地局
において、前記移動局からの上りフレーム内の前記送信
電力制御ビットに応じて仮下り送信電力を計算する手段
と、当該計算した仮下り送信電力が、予め設定した最大
送信電力よりも小さい場合には、前記計算した仮下り送
信電力を下り送信電力とし、逆の場合には前記最大送信
電力を下り送信電力とする手段と、該下り送信電力で信
号を送信する手段とを具備することを特徴とする。According to a sixth aspect of the present invention, in a communication apparatus of a code division multiple access system that performs multiple access using spread spectrum, the mobile station receives desired signal power from a base station performing communication. , A means for calculating an actual SIR which is a ratio of the sum of interference power and thermal noise power from other stations, and whether the actual SIR is larger than a predetermined SIR for satisfying a required quality, Means for determining whether it is small, means for generating a transmission power control bit based on the determination result, means for periodically inserting the transmission power control bit in an upstream frame, and a base station from the mobile station. Means for calculating the provisional downlink transmission power according to the transmission power control bit in the uplink frame, and the calculated provisional downlink transmission power is smaller than a preset maximum transmission power. In the case of no, the calculated provisional downlink transmission power is used as downlink transmission power, and in the opposite case, the maximum transmission power is used as downlink transmission power, and means for transmitting a signal with the downlink transmission power. It is characterized by

【００２２】請求項７に記載の発明は、請求項５または
６において、前記最大送信電力は、セル当りの最大加入
者容量、セル半径および場所率に基づいて設定すること
を特徴とする。The invention according to claim 7 is characterized in that, in claim 5 or 6, the maximum transmission power is set based on the maximum subscriber capacity per cell, the cell radius and the location ratio.

【００２３】請求項８に記載の発明は、請求項５におい
て、移動局において、通信を行なっている基地局からの
希望波信号受信電力と、他の局からの干渉電力および熱
雑音電力の和との比である第２の実際のＳＩＲを計算す
る手段と、当該第２の実際のＳＩＲが、所要の品質を満
たすための第２の所定のＳＩＲに対して大きいか、小さ
いかを判定する手段と、当該判定結果に基づいて第２の
送信電力制御ビットを生成する手段と、該第２の送信電
力制御ビットを上りフレーム内に周期的に挿入する手段
と、基地局において、前記移動局からの上りフレーム内
の前記第２の送信電力制御ビットに応じて仮下り送信電
力を計算する手段と、当該計算した仮下り送信電力が、
予め設定した第２の最大送信電力よりも小さい場合に
は、前記計算した仮下り送信電力を下り送信電力とし、
逆の場合には前記第２の最大送信電力を下り送信電力と
する手段と、該下り送信電力で信号を送信する手段とを
具備することを特徴とする。According to an eighth aspect of the invention, in the fifth aspect, the sum of the desired wave signal reception power from the base station with which the mobile station is communicating and the interference power and the thermal noise power from other stations is set in the mobile station. And a means for calculating a second actual SIR, which is a ratio of the second and the second actual SIR, and determining whether the second actual SIR is larger or smaller than a second predetermined SIR for satisfying the required quality. Means, means for generating a second transmission power control bit based on the determination result, means for periodically inserting the second transmission power control bit in an upstream frame, and the base station in the mobile station. Means for calculating the provisional downlink transmission power according to the second transmission power control bit in the uplink frame from, and the calculated provisional downlink transmission power,
When it is smaller than the preset second maximum transmission power, the calculated provisional downlink transmission power is set as the downlink transmission power,
In the opposite case, it is characterized by comprising means for setting the second maximum transmission power as downlink transmission power and means for transmitting a signal with the downlink transmission power.

【００２４】[0024]

【作用】本発明によれば、システムの最大加入者容量に
対して、基地局で所要の品質を満たすように、移動局の
最大送信電力に対して上限値を設けているので、移動局
送信増幅器は、制御の過程で、最大送信電力に発散する
ことはない。また、下りに対しても、他セルからの干渉
電力に追従できる、同様の送信電力制御を実現できる。According to the present invention, the maximum transmission power of the mobile station is set to the upper limit so that the base station can satisfy the required quality for the maximum subscriber capacity of the system. The amplifier does not diverge to maximum transmit power in the course of control. Further, the same transmission power control that can follow the interference power from other cells can be realized even in the downlink.

【００２５】[0025]

【実施例】以下、図面を参照して、本発明の実施例を説
明するが、その前に、本発明の原理を説明する。Embodiments of the present invention will be described below with reference to the drawings, but before that, the principle of the present invention will be described.

【００２６】図７は、本発明の送信電力制御法の動作原
理を示す。基地局の無線機では、通話を行なっている移
動局からの希望波受信信号電力（Ｓ）と、熱雑音および
他の移動局からの干渉信号電力（Ｉ）の和との比が、所
要の受信品質を満たすように移動局の送信電力制御を行
なう。この周期は、ドップラー周波数に応じた瞬時変動
に追従できる周期以下にする。干渉信号が増えてきて、
移動局の送信電力ＰTが増大し、システムの最大加入者
容量、セル半径、および場所率で決まるシステムの移動
局最大送信電力Ｐmax になったら、この値Ｐmax で固定
して送信する。このため、移動局の送信電力は、基地局
の最大信号レベルＳmax に対応する、最大送信電力Ｐma
x 以上に上昇することはない。なお、場所率とは、サー
ビスエリア内に、所要の回線品質を満足できない場所
が、何パーセントあるかを表すものである。FIG. 7 shows the operating principle of the transmission power control method of the present invention. In the radio of the base station, the ratio between the desired wave received signal power (S) from the mobile station making the call and the sum of thermal noise and interference signal power (I) from other mobile stations is required. The transmission power of the mobile station is controlled so as to satisfy the reception quality. This period is set to be equal to or shorter than the period that can follow the instantaneous fluctuation according to the Doppler frequency. Interfering signals are increasing,
When the transmission power P T of the mobile station increases and reaches the mobile station maximum transmission power Pmax of the system which is determined by the maximum subscriber capacity of the system, the cell radius, and the location ratio, this value is fixed and transmitted. Therefore, the transmission power of the mobile station is the maximum transmission power Pma corresponding to the maximum signal level Smax of the base station.
It cannot rise above x. The location rate represents the percentage of locations in the service area where the required line quality cannot be satisfied.

【００２７】下りについても、セル周辺の領域では、他
セルからの干渉の瞬時変動に対しても追従するように、
クローズドループによる送信電力制御を行なう。この場
合も、上りと同様に、移動局の受信ＳＩＲに応じて基地
局送信電力を制御し、上限値である最大送信電力Ｐ′ma
x になったら、この値Ｐ′max で固定して、送信するた
め基地局の送信電力は、これ以上上昇することはない。Also in the downlink, in the area around the cell, it is possible to follow the instantaneous fluctuation of interference from other cells.
Transmission power control by closed loop is performed. Also in this case, the base station transmission power is controlled according to the reception SIR of the mobile station as in the case of the uplink, and the maximum transmission power P′ma that is the upper limit value is
When x is reached, the value is fixed at this value P'max, and the transmission power of the base station does not rise any more because it is transmitted.

【００２８】図８は、移動局における送信電力制御に関
連する構成を示す。FIG. 8 shows a configuration related to transmission power control in the mobile station.

【００２９】図８において、１は受信信号（高周波）を
高周波（ＲＦ）からＩＦに変換するＲＦ部ダウンコンバ
ータ、２はＲＦ部ダウンコンバータ１からの出力信号に
相当する一定レベル出力が得られるように制御するＡＧ
Ｃ（ａｕｔｏｍａｔｉｃ ｇａｉｎ ｃｏｎｔｒｏｌ）
増幅器、３はＡＧＣ増幅器２からの出力信号を直交検波
する直交検波器、４は直交検波器３からの出力信号を逆
拡散する逆拡散部（例えばマッチドフィルタまたはスラ
イディング相関器からなる）であり、この逆拡散部４か
らの出力信号は、復調部（および）ＲＡＫＥ（レイク）
合成部５、タイミング生成部６、希望波受信信号電力検
出部７および干渉信号電力検出部８に入力される。In FIG. 8, 1 is an RF section down converter for converting a received signal (high frequency) from high frequency (RF) to IF, and 2 is a constant level output corresponding to the output signal from the RF section down converter 1. Controlled by AG
C (automatic gain control)
The amplifier 3 is a quadrature detector that quadrature-detects the output signal from the AGC amplifier 2, and 4 is a despreader that despreads the output signal from the quadrature detector 3 (for example, a matched filter or a sliding correlator). The output signal from the despreading unit 4 is a demodulation unit (and) RAKE (rake).
It is input to the combining unit 5, the timing generation unit 6, the desired wave reception signal power detection unit 7, and the interference signal power detection unit 8.

【００３０】タイミング生成部６は、入力信号から同期
信号を検出し、この検出した同期信号に基づいて、希望
波受信信号電力検出部７および干渉信号電力検出部８に
タイミングクロックを供給する。希望波受信信号電力検
出部７は、前記タイミングクロックに基づいて入力信号
から希望波受信信号電力を検出し、干渉信号電力検出部
８は前記タイミングクロックに基づいて入力信号から干
渉信号電力を検出し、これらの検出出力から、受信ＳＩ
Ｒ計算部９において受信ＳＩＲを計算し、その計算結果
である受信ＳＩＲを送信電力制御ビット生成部１０に送
る。送信電力制御ビット生成部１０は、この受信ＳＩＲ
を、所要の受信品質を満たすためのあらかじめ定めた所
定ＳＩＲと比較して、基地局の送信電力を決定するため
の送信電力制御ビットを決定する。The timing generator 6 detects a synchronization signal from the input signal and supplies a timing clock to the desired wave reception signal power detector 7 and the interference signal power detector 8 based on the detected synchronization signal. The desired wave reception signal power detection unit 7 detects the desired wave reception signal power from the input signal based on the timing clock, and the interference signal power detection unit 8 detects the interference signal power from the input signal based on the timing clock. , From these detection outputs, receive SI
The R calculation unit 9 calculates the reception SIR and sends the calculation result, the reception SIR, to the transmission power control bit generation unit 10. The transmission power control bit generation unit 10 uses this reception SIR.
Is compared with a predetermined SIR for satisfying the required reception quality, and the transmission power control bit for determining the transmission power of the base station is determined.

【００３１】復調器（および）ＲＡＫＥ合成部５は、
（レイク合成した）入力信号を復調してフレーム分離部
１１に供給し、そこで所望のフレームから送信電力制御
ビットを抽出し、送信電力決定部１２に供給する。この
送信電力決定部１２においては、供給された送信電力制
御ビットに応じて送信電力（ＰT ）を決定すると共に、
最大電力（Ｐmax ）計算部１３によって計算されたＰma
x （詳細は後述する）を参照して、ＰT がＰmax より小
さい場合はＰT に該当する値を出力し、逆の場合にはＰ
max に該当する値を出力する。The demodulator (and) RAKE combiner 5
The (rake-combined) input signal is demodulated and supplied to the frame separation unit 11, where the transmission power control bit is extracted from the desired frame and supplied to the transmission power determination unit 12. The transmission power determining unit 12 determines the transmission power (P T ) according to the supplied transmission power control bit, and
Pma calculated by the maximum power (Pmax) calculation unit 13
With reference to x (details will be described later), when P T is smaller than P max, a value corresponding to P T is output, and in the opposite case, P T is output.
Output the value corresponding to max.

【００３２】最大電力計算部１３は、次のようにして、
最大電力Ｐmax を計算する。まず、基地局での受信電力
Ｓは次式で表わされる。The maximum power calculation section 13 performs the following procedure.
Calculate the maximum power Pmax. First, the received power S at the base station is expressed by the following equation.

【００３３】[0033]

【数１】 [Equation 1]

【００３４】ここで、ＳＮＲは、所要の品質（誤り率）
を満たすための希望波受信電力対干渉電力をも含めた雑
音電力比、Ｎ0 は熱雑音電力密度、ＴS は情報データシ
ンボル周期、ｐｇは拡散率、Ｃは１セルあたりの加入者
容量、αは自セルに対する他セルからの干渉電力比であ
る。この式から基地局での受信電力が次式のように求ま
るから、Here, the SNR is the required quality (error rate).
Noise power ratio including the desired wave received power to interference power to satisfy the following, N 0 is thermal noise power density, T S is information data symbol period, pg is spreading factor, C is subscriber capacity per cell, α is the interference power ratio from the other cell to the own cell. From this equation, the received power at the base station is calculated as

【００３５】[0035]

【数２】 [Equation 2]

【００３６】伝搬ロスＰLOSSを考慮して移動局の最大送
信電力Ｐmax は、次式のようになる。Considering the propagation loss P LOSS , the maximum transmission power Pmax of the mobile station is given by the following equation.

【００３７】[0037]

【数３】 (Equation 3)

【００３８】基地局最大送信電力も同様に求めることが
できる。The base station maximum transmission power can be obtained in the same manner.

【００３９】フレーム生成部１４は、送信電力制御ビッ
ト生成部１０からの送信電力制御ビットと、音声等の情
報データおよび通信制御のためのパイロットデータ等と
を入力してフレーム（上りフレーム）を生成し、拡散部
１５に供給する。拡散部１５は、拡散符号生成部１６か
らの拡散符号に応答してフレーム生成部１４からの信号
をスペクトラム拡散し、直交変調器１７に供給する。直
交変調器１７は、拡散部１５からの信号を直交変調し、
ＲＦ部アップコンバータ１８に供給する。このＲＦ部ア
ップコンバータ部１８では、直交変調器１７からの信号
を高周波信号に変換し、パワーアンプ１９に供給する。
パワーアンプ１９は、ＲＦ部アップコンバータ部１８か
らの信号を、送信電力が送信電力決定部１２で決定され
た送信電力値になるように増幅制御し、不図示のアンテ
ナ系に供給する。なお、このパワーアンプ１９での送信
電力制御の周期は、ドップラー周波数に応じた瞬時変動
に追従できる周期以下にする。The frame generation unit 14 inputs the transmission power control bits from the transmission power control bit generation unit 10 and information data such as voice and pilot data for communication control and generates a frame (uplink frame). And supplies it to the diffusion unit 15. The spreader 15 spreads the signal from the frame generator 14 in response to the spread code from the spread code generator 16 and supplies the spread spectrum signal to the quadrature modulator 17. The quadrature modulator 17 quadrature modulates the signal from the spreading unit 15,
It is supplied to the RF unit up-converter 18. The RF section up-converter section 18 converts the signal from the quadrature modulator 17 into a high frequency signal and supplies it to the power amplifier 19.
The power amplifier 19 amplifies and controls the signal from the RF up-converter unit 18 so that the transmission power becomes the transmission power value determined by the transmission power determination unit 12, and supplies the signal to an antenna system (not shown). In addition, the cycle of the transmission power control in the power amplifier 19 is set to be equal to or shorter than the cycle capable of following the instantaneous fluctuation according to the Doppler frequency.

【００４０】以上は、移動局の構成であり、基地局にお
いても同様な構成および動作であるが、移動局と異なる
部分の構成のみを図９に示す。すなわち、移動局ではパ
ワーアンプ１９で送信電力制御するが、基地局では複数
チャネルをベースバンド合成し、共通増幅するので、Ｒ
Ｆ部アップコンバータ部１８′の入力側にベースバンド
の電力制御部２０を設け、ここで、直交変調器１７′か
らの信号（ベースバンド）を送信電力決定部１２′から
の送信電力値に応答して電力制御（ビットシフト）す
る。The above is the configuration of the mobile station and the same configuration and operation in the base station, but only the configuration of the part different from the mobile station is shown in FIG. That is, the mobile station controls the transmission power by the power amplifier 19, but the base station performs baseband synthesis of a plurality of channels and performs common amplification.
A baseband power control section 20 is provided on the input side of the F section up-converter section 18 ', where the signal (baseband) from the quadrature modulator 17' responds to the transmission power value from the transmission power determining section 12 '. Power control (bit shift).

【００４１】図１０は、移動局の送信電力制御を示すフ
ローチャートである。送信電力ＰTは、基地局から送ら
れてきた送信電力制御ビットに基づいて、ステップＳＰ
１で計算される。ついで、計算された電力ＰT は、ステ
ップＳＰ２で最大電力Ｐmaxと比較される。もし、計算
された電力ＰT が最大電力Ｐmax 以下であれば、送信電
力は、ステップＳＰ３でＰT に設定される。一方、ＰT
がＰmax より大きいと、送信電力は、ステップＳＰ４で
Ｐmax に設定される。FIG. 10 is a flowchart showing the transmission power control of the mobile station. The transmission power P T is based on the transmission power control bit sent from the base station
Calculated as 1. The calculated power P T is then compared with the maximum power Pmax in step SP2. If the calculated power P T is less than or equal to the maximum power P max, the transmission power is set to P T in step SP3. On the other hand, P T
Is larger than Pmax, the transmission power is set to Pmax in step SP4.

【００４２】図１１は、基地局の送信電力制御を示すフ
ローチャートである。送信電力ＰTは、移動局から送ら
れてきた送信電力制御ビットに基づいて、ステップＳＰ
１１で計算される。ついで、計算された電力ＰT は、ス
テップＳＰ１２で最大電力Ｐmax と比較される。計算さ
れた電力ＰT が最大電力Ｐmax 以下であれば、送信電力
は、ステップＳＰ１３でＰT に設定される。一方、ＰT
がＰmax より大きいと、送信電力は、ステップＳＰ１４
でＰmax に設定される。FIG. 11 is a flowchart showing the transmission power control of the base station. The transmission power P T is based on the transmission power control bit sent from the mobile station
Calculated as 11. The calculated power P T is then compared to the maximum power Pmax in step SP12. If the calculated power P T is less than or equal to the maximum power P max, the transmission power is set to P T in step SP13. On the other hand, P T
Is larger than Pmax, the transmission power is calculated in step SP14.
Is set to Pmax.

【００４３】図１２は、本発明による閉ループ送信電力
制御方法の一例を示す。送信電力制御は、次のように行
われる（［ ］中の数字は、図１２の番号と対応してい
る）。FIG. 12 shows an example of the closed loop transmission power control method according to the present invention. The transmission power control is performed as follows (the numbers in [] correspond to the numbers in FIG. 12).

【００４４】［１］基地局は、希望受信信号電力を測定
し、ＳＩＲを計算する。[1] The base station measures the desired received signal power and calculates the SIR.

【００４５】［２］基地局は、測定したＳＩＲと、予め
定めた基準ＳＩＲとを比較して、２送信電力制御周期後
の送信電力を評価する。[2] The base station compares the measured SIR with a predetermined reference SIR to evaluate the transmission power after two transmission power control cycles.

【００４６】［３］基地局は、移動局の送信電力の増減
を指示する送信電力制御ビットを作り、下りフレームに
周期的に挿入する。この挿入同期は、ドップラー周波数
に応じた瞬時変動に、電力制御が追従できる周期とす
る。[3] The base station creates a transmission power control bit for instructing the increase or decrease of the transmission power of the mobile station and periodically inserts it into the downlink frame. This insertion synchronization has a cycle in which the power control can follow the instantaneous fluctuation according to the Doppler frequency.

【００４７】［４］移動局は、基地局からの下りフレー
ムに含まれる、上り送信電力制御ビットをデコードす
る。[4] The mobile station decodes the uplink transmission power control bit included in the downlink frame from the base station.

【００４８】［５］移動局は、上り送信電力制御ビット
によって指示された送信電力で送信する。[5] The mobile station transmits with the transmission power indicated by the uplink transmission power control bit.

【００４９】なお、上りについては、移動局の送信増幅
器は、数ｋｍのセル半径では、７０ｄＢ以上のダイナミ
ックレンジが必要である。しかし、下りについては、セ
ル周辺で他セルからの干渉を受けた場合、自局の送信電
力を上げると、セル内の他の通信者に対する干渉となる
ので、基地局送信電力の最大電力Ｐ′max の定常状態か
らの変化量は、１０ｄＢ以下の小さい範囲に抑えておく
必要がある。For upstream, the transmission amplifier of the mobile station needs a dynamic range of 70 dB or more in a cell radius of several km. However, for downlink, when interference from other cells is received in the vicinity of the cell, increasing the transmission power of the own station causes interference with other correspondents in the cell, so the maximum power P ′ of the base station transmission power is P ′. It is necessary to keep the amount of change of max from the steady state within a small range of 10 dB or less.

【００５０】[0050]

【発明の効果】以上説明したように、本発明によれば、
システムの最大加入者容量に対して、基地局で所要の品
質を満たすように、移動局の最大送信電力に対して上限
値を設けているので、移動局送信増幅器は、制御の過程
で、最大送信電力に発散することはない。また、下りに
対しても、他セルからの干渉電力に追従できる同様の送
信電力制御を実現できる。As described above, according to the present invention,
For the maximum subscriber capacity of the system, the upper limit is set for the maximum transmission power of the mobile station so that the base station can satisfy the required quality. It does not diverge in transmit power. Further, the same transmission power control that can follow the interference power from other cells can be realized for the downlink.

【図面の簡単な説明】[Brief description of drawings]

【図１】上り回線における他の移動局からの干渉を示す
図である。FIG. 1 is a diagram showing interference from another mobile station in an uplink.

【図２】上り送信電力制御した場合の基地局受信信号レ
ベルを示す図である。FIG. 2 is a diagram showing a base station reception signal level when uplink transmission power control is performed.

【図３】下り回線における他のセルからの干渉を示す図
である。FIG. 3 is a diagram showing interference from another cell in the downlink.

【図４】下り回線における移動局受信信号レベルを示す
図である。FIG. 4 is a diagram showing a mobile station received signal level in a downlink.

【図５】ＳＩＲに対して送信電力制御をする従来の第１
方法を示す図である。FIG. 5 is a first conventional example that controls transmission power for SIR.
It is a figure which shows the method.

【図６】熱雑音レベルに対して送信電力制御をする従来
の第２方法を示す図である。FIG. 6 is a diagram showing a second conventional method for controlling transmission power with respect to a thermal noise level.

【図７】本発明の送信電力制御の動作原理を示す図であ
る。FIG. 7 is a diagram showing an operating principle of transmission power control of the present invention.

【図８】本発明における移動局の送信電力制御にかかる
構成を示すブロック図である。FIG. 8 is a block diagram showing a configuration related to transmission power control of a mobile station according to the present invention.

【図９】本発明における基地局の送信電力制御にかかる
一部の構成を示すブロック図である。FIG. 9 is a block diagram showing a part of the configuration related to transmission power control of a base station in the present invention.

【図１０】本発明の上り送信電力制御法の制御フローを
示すフローチャートである。FIG. 10 is a flowchart showing a control flow of the uplink transmission power control method of the present invention.

【図１１】本発明の下り送信電力制御法の制御フローを
示すフローチャートである。FIG. 11 is a flowchart showing a control flow of the downlink transmission power control method of the present invention.

【図１２】クローズドループによる送信電力制御の動作
を示す図である。FIG. 12 is a diagram showing an operation of transmission power control by a closed loop.

【符号の説明】[Explanation of symbols]

７ 希望波受信信号電力検出部 ８ 干渉信号電力検出部 ９ 受信ＳＩＲ計算部 １０ 送信電力制御ビット生成部 １２ 送信電力決定部 １３ Ｐmax 計算部 １９ パワー増幅器 7 Desired Wave Received Signal Power Detection Section 8 Interference Signal Power Detection Section 9 Received SIR Calculation Section 10 Transmission Power Control Bit Generation Section 12 Transmission Power Decision Section 13 Pmax Calculation Section 19 Power Amplifier

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大野 公士 東京都港区虎ノ門二丁目10番１号 エヌ・ ティ・ティ移動通信網株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kouji Ohno 2-10-1, Toranomon, Minato-ku, Tokyo NTT Mobile Communication Network Co., Ltd.

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 スペクトル拡散を用いてマルチプルアク
セスを行なう符号分割多元接続方式の送信電力制御法に
おいて、 基地局において、通信を行なっている移動局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である第１の実際のＳＩＲを計算し、 当該第１の実際のＳＩＲが、所要の品質を満たすための
第１の所定のＳＩＲに対して大きいか、小さいかを判定
し、 当該判定結果に基づいて第１の送信電力制御ビットを生
成し、 該第１の送信電力制御ビットを下りフレーム内に周期的
に挿入し、 移動局において、前記基地局からの下りフレーム内の前
記第１の送信電力制御ビットに応じて仮上り送信電力を
計算し、 当該計算した仮上り送信電力が、予め設定した第１の最
大送信電力よりも小さい場合には、前記計算した仮上り
送信電力を上り送信電力とし、逆の場合には前記第１の
最大送信電力を上り送信電力とし、 該上り送信電力で信号を送信することを特徴とする送信
電力制御法。1. A transmission power control method of a code division multiple access system for performing multiple access using spread spectrum, in which a base station receives desired wave signal reception power from a mobile station with which communication is performed and from other stations. A first actual SIR, which is a ratio of the interference power and the thermal noise power to the first actual SIR, and the first actual SIR is larger than the first predetermined SIR for satisfying the required quality. Whether or not it is smaller, generates a first transmission power control bit based on the result of the determination, periodically inserts the first transmission power control bit into a downlink frame, The provisional uplink transmission power is calculated according to the first transmission power control bit in the downlink frame from the station, and when the calculated provisional uplink transmission power is smaller than the preset first maximum transmission power. A transmission power control method, characterized in that the calculated provisional uplink transmission power is defined as uplink transmission power, and in the opposite case, the first maximum transmission power is defined as uplink transmission power, and a signal is transmitted at the uplink transmission power. . 【請求項２】 スペクトル拡散を用いてマルチプルアク
セスを行なう符号分割多元接続方式の送信電力制御法に
おいて、 移動局において、通信を行なっている基地局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である実際のＳＩＲを計算し、 当該実際のＳＩＲが、所要の品質を満たすための所定の
ＳＩＲに対して大きいか、小さいかを判定し、 当該判定結果に基づいて送信電力制御ビットを生成し、 該送信電力制御ビットを上りフレーム内に周期的に挿入
し、 基地局において、前記移動局からの上りフレーム内の前
記送信電力制御ビットに応じて仮下り送信電力を計算
し、 当該計算した仮下り送信電力が、予め設定した最大送信
電力よりも小さい場合には、前記計算した仮下り送信電
力を下り送信電力とし、逆の場合には前記最大送信電力
を下り送信電力とし、 該下り送信電力で信号を送信することを特徴とする送信
電力制御法。2. In a transmission power control method of a code division multiple access system for performing multiple access using spread spectrum, in a mobile station, a desired wave signal reception power from a base station with which communication is performed and a transmission power control method from another station. The actual SIR, which is the ratio of the interference power to the sum of the interference power and the thermal noise power, is calculated, and it is determined whether the actual SIR is larger or smaller than a predetermined SIR for satisfying the required quality. A transmission power control bit is generated based on the determination result, the transmission power control bit is periodically inserted in an uplink frame, and at the base station, in accordance with the transmission power control bit in the uplink frame from the mobile station. The provisional downlink transmission power is calculated, and when the calculated provisional downlink transmission power is smaller than the preset maximum transmission power, the calculated provisional downlink transmission power is set to the downlink transmission power. In the opposite case, the maximum transmission power is set as the downlink transmission power, and the signal is transmitted at the downlink transmission power. 【請求項３】 請求項１または２において、前記最大送
信電力は、セル当りの最大加入者容量、セル半径および
場所率に基づいて設定することを特徴とする送信電力制
御法。3. The transmission power control method according to claim 1, wherein the maximum transmission power is set based on a maximum subscriber capacity per cell, a cell radius and a location ratio. 【請求項４】 請求項１において、 移動局において、通信を行なっている基地局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である第２の実際のＳＩＲを計算し、 当該第２の実際のＳＩＲが、所要の品質を満たすための
第２の所定のＳＩＲに対して大きいか、小さいかを判定
し、 当該判定結果に基づいて第２の送信電力制御ビットを生
成し、 該第２の送信電力制御ビットを上りフレーム内に周期的
に挿入し、 基地局において、前記移動局からの上りフレーム内の前
記第２の送信電力制御ビットに応じて仮下り送信電力を
計算し、 当該計算した仮下り送信電力が、予め設定した第２の最
大送信電力よりも小さい場合には、前記計算した仮下り
送信電力を下り送信電力とし、逆の場合には前記第２の
最大送信電力を下り送信電力とし、 該下り送信電力で信号を送信することを特徴とする送信
電力制御法。4. The mobile station according to claim 1, which is a ratio of a reception power of a desired wave signal from a base station communicating with a mobile station and a sum of interference power and thermal noise power from another station. Of the second actual SIR to determine whether the second actual SIR is larger or smaller than the second predetermined SIR for satisfying the required quality, and based on the result of the determination, the second actual SIR is calculated. And transmitting the second transmission power control bit to the second transmission power control bit in the upstream frame from the mobile station at the base station by periodically inserting the second transmission power control bit into the upstream frame. The provisional downlink transmission power is calculated accordingly, and when the calculated provisional downlink transmission power is smaller than the preset second maximum transmission power, the calculated provisional downlink transmission power is set as the downlink transmission power, and In the case of the second maximum transfer A transmission power control method, characterized in that the received power is downlink transmission power and a signal is transmitted at the downlink transmission power. 【請求項５】 スペクトル拡散を用いてマルチプルアク
セスを行なう符号分割多元接続方式の通信装置におい
て、 基地局において、通信を行なっている移動局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である第１の実際のＳＩＲを計算する手
段と、 当該第１の実際のＳＩＲが、所要の品質を満たすための
第１の所定のＳＩＲに対して大きいか、小さいかを判定
する手段と、 当該判定結果に基づいて第１の送信電力制御ビットを生
成する手段と、 該第１の送信電力制御ビットを下りフレーム内に周期的
に挿入する手段と、 移動局において、前記基地局からの下りフレーム内の前
記第１の送信電力制御ビットに応じて仮上り送信電力を
計算する手段と、 当該計算した仮上り送信電力が、予め設定した第１の最
大送信電力よりも小さい場合には、前記計算した仮上り
送信電力を上り送信電力とし、逆の場合には前記第１の
最大送信電力を上り送信電力とする手段と、 該上り送信電力で信号を送信する手段とを具備すること
を特徴とする通信装置。5. A code division multiple access system communication apparatus which performs multiple access using spread spectrum, wherein a base station receives desired signal power from a mobile station with which it is communicating and interference from other stations. A means for calculating a first actual SIR which is a ratio of the power and the thermal noise power, the first actual SIR being greater than the first predetermined SIR for satisfying the required quality A means for determining whether it is smaller or smaller, a means for generating a first transmission power control bit based on the determination result, a means for periodically inserting the first transmission power control bit in a downlink frame, In the mobile station, means for calculating the provisional uplink transmission power in accordance with the first transmission power control bit in the downlink frame from the base station, and the calculated provisional uplink transmission power are preset first And a means for setting the calculated provisional uplink transmission power as the uplink transmission power, and conversely, the first maximum transmission power as the uplink transmission power. A communication device, comprising: a means for transmitting a signal. 【請求項６】 スペクトル拡散を用いてマルチプルアク
セスを行なう符号分割多元接続方式の通信装置におい
て、 移動局において、通信を行なっている基地局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である実際のＳＩＲを計算する手段と、 当該実際のＳＩＲが、所要の品質を満たすための所定の
ＳＩＲに対して大きいか、小さいかを判定する手段と、 当該判定結果に基づいて送信電力制御ビットを生成する
手段と、 該送信電力制御ビットを上りフレーム内に周期的に挿入
する手段と、 基地局において、前記移動局からの上りフレーム内の前
記送信電力制御ビットに応じて仮下り送信電力を計算す
る手段と、 当該計算した仮下り送信電力が、予め設定した最大送信
電力よりも小さい場合には、前記計算した仮下り送信電
力を下り送信電力とし、逆の場合には前記最大送信電力
を下り送信電力とする手段と、 該下り送信電力で信号を送信する手段とを具備すること
を特徴とする通信装置。6. A code division multiple access system communication apparatus for performing multiple access using spread spectrum, wherein a mobile station receives desired wave signal reception power from a base station with which communication is performed and interference from other stations. A means for calculating an actual SIR which is a ratio of a power and a thermal noise power, and a means for determining whether the actual SIR is larger or smaller than a predetermined SIR for satisfying a required quality. A means for generating a transmission power control bit based on the determination result, a means for periodically inserting the transmission power control bit in an uplink frame, and a base station for transmitting the transmission power in the uplink frame from the mobile station. A means for calculating the provisional downlink transmission power according to the power control bit, and if the calculated provisional downlink transmission power is smaller than a preset maximum transmission power, A communication comprising: a means for setting the calculated provisional downlink transmission power as downlink transmission power and, in the opposite case, the maximum transmission power for downlink transmission power; and means for transmitting a signal at the downlink transmission power. apparatus. 【請求項７】 請求項５または６において、前記最大送
信電力は、セル当りの最大加入者容量、セル半径および
場所率に基づいて設定することを特徴とする通信装置。7. The communication device according to claim 5, wherein the maximum transmission power is set based on a maximum subscriber capacity per cell, a cell radius and a location rate. 【請求項８】 請求項５において、 移動局において、通信を行なっている基地局からの希望
波信号受信電力と、他の局からの干渉電力および熱雑音
電力の和との比である第２の実際のＳＩＲを計算する手
段と、 当該第２の実際のＳＩＲが、所要の品質を満たすための
第２の所定のＳＩＲに対して大きいか、小さいかを判定
する手段と、 当該判定結果に基づいて第２の送信電力制御ビットを生
成する手段と、 該第２の送信電力制御ビットを上りフレーム内に周期的
に挿入する手段と、 基地局において、前記移動局からの上りフレーム内の前
記第２の送信電力制御ビットに応じて仮下り送信電力を
計算する手段と、 当該計算した仮下り送信電力が、予め設定した第２の最
大送信電力よりも小さい場合には、前記計算した仮下り
送信電力を下り送信電力とし、逆の場合には前記第２の
最大送信電力を下り送信電力とする手段と、 該下り送信電力で信号を送信する手段とを具備すること
を特徴とする通信装置。8. The mobile station according to claim 5, which is a ratio of a reception power of a desired wave signal from a base station communicating with a mobile station and a sum of interference power and thermal noise power from another station. Means for calculating the actual SIR of, and a means for determining whether the second actual SIR is larger or smaller than a second predetermined SIR for satisfying the required quality, and A means for generating a second transmission power control bit on the basis of the second transmission power control bit, a means for periodically inserting the second transmission power control bit in an upstream frame; A means for calculating the provisional downlink transmission power according to the second transmission power control bit, and if the calculated provisional downlink transmission power is smaller than a preset second maximum transmission power, the calculated provisional downlink transmission power. Transmit power down A communication device comprising: means for transmitting signal power, and in the opposite case, means for setting the second maximum transmission power as downlink transmission power, and means for transmitting a signal at the downlink transmission power.
JP7077937A 1994-05-12 1995-04-03 Transmission power control method and communication device using the transmission power control method Expired - Lifetime JP2993554B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP7077937A JP2993554B2 (en) 1994-05-12 1995-04-03 Transmission power control method and communication device using the transmission power control method
CA 2149095 CA2149095C (en) 1994-05-12 1995-05-10 Transmission power control method and communication system using the same
KR1019950011473A KR0143837B1 (en) 1994-05-12 1995-05-10 Transmission power control for mobile radio
CN95105384A CN1082771C (en) 1994-05-12 1995-05-11 A transmission power control method and a communication system using the same
CNB001259881A CN1187908C (en) 1994-05-12 1995-05-11 Method for controlling emitted power and communication system using same
US08/439,302 US5566165A (en) 1994-05-12 1995-05-11 Transmission power control method and a communication system using the same
EP19950303222 EP0682418B9 (en) 1994-05-12 1995-05-12 Transmission power control for mobile radio
DE1995633818 DE69533818T3 (en) 1994-05-12 1995-05-12 Transmission power control for mobile communications

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6-98816 1994-05-12
JP9881694 1994-05-12
JP7077937A JP2993554B2 (en) 1994-05-12 1995-04-03 Transmission power control method and communication device using the transmission power control method

Publications (2)

Publication Number Publication Date
JPH0832515A true JPH0832515A (en) 1996-02-02
JP2993554B2 JP2993554B2 (en) 1999-12-20

Family

ID=26418990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7077937A Expired - Lifetime JP2993554B2 (en) 1994-05-12 1995-04-03 Transmission power control method and communication device using the transmission power control method

Country Status (7)

Country Link
US (1) US5566165A (en)
EP (1) EP0682418B9 (en)
JP (1) JP2993554B2 (en)
KR (1) KR0143837B1 (en)
CN (2) CN1082771C (en)
CA (1) CA2149095C (en)
DE (1) DE69533818T3 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037111A1 (en) * 1998-01-16 1999-07-22 Ntt Mobile Communications Network Inc. Transmission power control method, mobile phone, base station, and recording medium
US6148216A (en) * 1997-05-21 2000-11-14 Matsushita Electric Industrial Co., Ltd. System and method for wireless communications
WO2001001610A1 (en) * 1999-06-28 2001-01-04 Samsung Electronics Co., Ltd. Apparatus and method of controlling forward link power when in discontinuous transmission mode in a mobile communication system
US6178194B1 (en) 1997-01-16 2001-01-23 Nec Corporation Cellular mobile telephone system
US6330455B1 (en) 1998-07-27 2001-12-11 Nec Corporation Transmission power controller for use in mobile communication terminal equipment
US6405052B1 (en) 1998-05-28 2002-06-11 Nec Corporation Method for power control during call acquisition in CDMA mobile communication systems
US6405021B1 (en) 1998-03-27 2002-06-11 Nec Corporation Method of controlling transmission power in cellular system and base station apparatus
KR100473252B1 (en) * 1996-11-27 2005-03-08 가부시끼가이샤 히다치 세이사꾸쇼 Transmission power control method and apparatus for mobile communication system
JP2009522955A (en) * 2006-01-05 2009-06-11 クゥアルコム・インコーポレイテッド Power supply control for service provision sector command
JP2009527198A (en) * 2006-02-17 2009-07-23 アルカテル−ルーセント ユーエスエー インコーポレーテッド Reverse link power control method
JP2009527197A (en) * 2006-02-17 2009-07-23 アルカテル−ルーセント ユーエスエー インコーポレーテッド Reverse link power control method
US7813751B2 (en) 2000-08-09 2010-10-12 Nec Corporation Transmission power control system and method capable of saving battery consumption of mobile station and preventing connection capacity from being reduced
JP2012521173A (en) * 2009-03-17 2012-09-10 インターデイジタル パテント ホールディングス インコーポレイテッド Method and apparatus for power control of sounding reference signal (SRS) transmission

Families Citing this family (114)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802110A (en) * 1994-02-16 1998-09-01 Matsushita Electric Industrial Co., Ltd. Wireless mobile system
FR2731571A1 (en) * 1995-03-08 1996-09-13 Philips Electronique Lab COMMUNICATION SYSTEM EQUIPPED WITH MEANS FOR TESTING A TRANSMISSION CHANNEL AND TEST METHOD
ZA965340B (en) 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6885652B1 (en) 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US7929498B2 (en) * 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US7020111B2 (en) 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
FI98674C (en) * 1995-08-18 1997-07-25 Nokia Mobile Phones Ltd A method for adjusting the transmission power during connection establishment and a cellular radio system
US5719898A (en) * 1995-09-29 1998-02-17 Golden Bridge Technology, Inc. Fuzzy-logic spread-spectrum adaptive power control
JPH09298490A (en) * 1996-04-30 1997-11-18 Yozan:Kk Spread spectrum communication system
US6396804B2 (en) * 1996-05-28 2002-05-28 Qualcomm Incorporated High data rate CDMA wireless communication system
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
JP3386098B2 (en) * 1996-06-20 2003-03-10 株式会社エヌ・ティ・ティ・ドコモ Signal transmission method in CDMA mobile communication system, mobile station apparatus and base station apparatus
GB2314705B (en) * 1996-06-25 2000-06-28 Nec Technologies Frequency hopping communications receivers
JP2734448B2 (en) * 1996-07-31 1998-03-30 日本電気株式会社 Base station transmission power control method
JP3818702B2 (en) 1996-08-07 2006-09-06 松下電器産業株式会社 CDMA radio transmission system, transmission power control apparatus and transmission power control measuring apparatus used in the system
US5983101A (en) * 1996-11-26 1999-11-09 Telefonaktiebolaget Lm Ericsson Point to multipoint radio access system
US5933781A (en) * 1997-01-31 1999-08-03 Qualcomm Incorporated Pilot based, reversed channel power control
US5991284A (en) * 1997-02-13 1999-11-23 Qualcomm Inc. Subchannel control loop
JP3586348B2 (en) * 1997-03-05 2004-11-10 富士通株式会社 Signal to interference power ratio measurement apparatus, signal to interference power ratio measurement method, and transmission power control method under CDMA communication system
US6046991A (en) * 1997-04-09 2000-04-04 Aloha Networks, Inc. TDM variable broadcast energy transmitter
EP2224623A3 (en) 1997-04-17 2011-04-06 NTT DoCoMo, Inc. Base station apparatus of mobile communication system
US6259927B1 (en) * 1997-06-06 2001-07-10 Telefonaktiebolaget Lm Ericsson Transmit power control in a radio communication system
US6151313A (en) * 1997-06-06 2000-11-21 Aloha Networks, Inc. Baseband phase estimation technique for demodulation of overlapping packets
US6304562B1 (en) * 1997-06-26 2001-10-16 Samsung Electronics Co., Ltd. Asymmetric forward power control in a CDMA communication
US6393005B1 (en) * 1997-06-27 2002-05-21 Nec Corporation Method of controlling transmitting power of a base station in a CDMA mobile communication system
JP3655057B2 (en) * 1997-07-19 2005-06-02 松下電器産業株式会社 CDMA transmitter and CDMA transmission method
KR19990012755A (en) * 1997-07-30 1999-02-25 윤종용 Reverse power control device and method for reducing interference
US5999832A (en) * 1997-07-31 1999-12-07 Vannatta; Louis J. Method of and apparatus for controlling a transmit power of a communication device
JP3156652B2 (en) * 1997-09-02 2001-04-16 日本電気株式会社 Mobile wireless communication device
KR100289036B1 (en) * 1997-09-05 2001-05-02 정규석 Method for controlling forward power of wll system
US5987333A (en) * 1997-09-30 1999-11-16 Nortel Networks Corporation/Corporation Nortel Networks Communications power control
DE19747455C1 (en) * 1997-10-27 1999-05-20 Siemens Ag Method and base station for providing subscriber signals for power measurement in a radio communication system
CA2248487C (en) * 1997-10-31 2002-01-15 Lucent Technologies Inc. Power control for mobile wireless communication system
EP0913957A1 (en) * 1997-10-31 1999-05-06 Lucent Technologies Inc. Power control for mobile wireless communication system
KR100369602B1 (en) * 1997-11-03 2003-04-11 삼성전자 주식회사 Power control bit inserting method of cdma mobile communication system
FI106665B (en) * 1997-11-05 2001-03-15 Nokia Mobile Phones Ltd A method and arrangement for determining transmit power in a mobile station
JP3270015B2 (en) * 1997-11-19 2002-04-02 沖電気工業株式会社 Transmission power control device
US6411799B1 (en) * 1997-12-04 2002-06-25 Qualcomm Incorporated Method and apparatus for providing ternary power control in a communication system
FI108181B (en) 1998-02-13 2001-11-30 Nokia Mobile Phones Ltd A power control method
DE69930239D1 (en) * 1998-03-26 2006-05-04 Samsung Electronics Co Ltd Device and method for controlling the performance of orthogonal channels and quasi-orthogonal channels in a CDMA communication system
JP3031327B2 (en) * 1998-03-26 2000-04-10 日本電気株式会社 Spread spectrum communication system and overload control method thereof
JP3429674B2 (en) * 1998-04-28 2003-07-22 沖電気工業株式会社 Multiplex communication system
JP3286247B2 (en) * 1998-05-08 2002-05-27 松下電器産業株式会社 Wireless communication system
DE19821519C2 (en) 1998-05-13 2001-08-09 Siemens Ag Method for operating a wireless telecommunication device in particular indoors
KR100330245B1 (en) * 1998-06-13 2002-08-17 삼성전자 주식회사 Forward link power control device and method in mobile communication system with transmit diversity
US6256476B1 (en) * 1998-06-25 2001-07-03 Conexant Systems, Inc. Power management for a telephone system by dynamically adjusting transmission power
KR100334818B1 (en) * 1998-07-07 2002-08-27 삼성전자 주식회사 Power control signal transmission method of mobile communication terminal device
US6278701B1 (en) 1998-07-10 2001-08-21 Verizon Laboratories Inc. Capacity enhancement for multi-code CDMA with integrated services through quality of services and admission control
KR100306285B1 (en) * 1998-07-28 2001-11-01 윤종용 Apparatus and method for gating transmission in control hold state of cdma communication system
ATE492074T1 (en) * 1998-07-28 2011-01-15 Samsung Electronics Co Ltd SWITCHED TRANSMISSION IN CONTROL HOLD STATE IN A CDMA COMMUNICATIONS SYSTEM
KR20000013025A (en) 1998-08-01 2000-03-06 윤종용 Forward initial transmitting power control device of telecommunication system and method therefor
KR100339034B1 (en) 1998-08-25 2002-10-11 삼성전자 주식회사 Reverse-loop closed-loop power control device and method in control-split state of code division multiple access communication system
JP4047461B2 (en) * 1998-08-27 2008-02-13 松下電器産業株式会社 Transmission power control device and transmission / reception device
JP4063419B2 (en) * 1998-10-06 2008-03-19 松下電器産業株式会社 Optical transmission system
US6373878B1 (en) * 1998-11-02 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Using a fast AGC as part of SIR calculation
WO2000033491A1 (en) * 1998-11-30 2000-06-08 Nokia Networks Oy Test facility for transceiver station
CA2355305A1 (en) * 1998-12-18 2000-06-29 Telefonaktiebolaget Lm Ericsson Method in a telecommunication system
EP1821431B1 (en) * 1998-12-21 2010-02-24 Hitachi, Ltd. Method for controlling transmit power in a communication system
US6434365B1 (en) * 1998-12-29 2002-08-13 Thomson Licensing Sa Providing initial power estimate to wireless telephone handsets
KR100401191B1 (en) * 1999-02-13 2003-10-10 삼성전자주식회사 Apparatus and method for controlling transmission of reverse link in cdma comminication system
KR100651457B1 (en) * 1999-02-13 2006-11-28 삼성전자주식회사 Method of contiguous outer loop power control in dtx mode of cdma mobile communication system
JP2000252952A (en) * 1999-03-02 2000-09-14 Nec Corp Machine and method for receiving cdma
JP3968190B2 (en) * 1999-03-06 2007-08-29 松下電器産業株式会社 Transceiver
EP1037483B1 (en) * 1999-03-16 2002-09-25 Alcatel A method for dynamically choosing a best parameter value for a power control algorithm in a mobile radiocommunication system
US6304563B1 (en) 1999-04-23 2001-10-16 Qualcomm Incorporated Method and apparatus for processing a punctured pilot channel
US6661832B1 (en) * 1999-05-11 2003-12-09 Qualcomm Incorporated System and method for providing an accurate estimation of received signal interference for use in wireless communications systems
KR100492968B1 (en) * 1999-05-29 2005-06-07 삼성전자주식회사 Apparatus and method for transmitting a channel signal gated in the control only substate of cdma communications system
JP2000349704A (en) 1999-06-03 2000-12-15 Matsushita Electric Ind Co Ltd Radio communication unit, transmission power control method for radio communication unit and recording medium
JP3631049B2 (en) * 1999-06-03 2005-03-23 松下電器産業株式会社 Packet communication apparatus and transmission power control method
JP3695571B2 (en) * 1999-07-21 2005-09-14 株式会社エヌ・ティ・ティ・ドコモ CDMA receiver and received signal power measuring method in CDMA mobile communication system
US8005077B1 (en) 1999-09-08 2011-08-23 Qwest Communications International Inc. Distributively routed VDSL and high-speed information packets
US6987769B1 (en) 1999-09-08 2006-01-17 Qwest Communications International Inc. System and method for dynamic distributed communication
US7388846B1 (en) * 1999-09-08 2008-06-17 Qwest Communications International Inc. Cellularized packetized voice and data
US6831902B1 (en) 1999-09-08 2004-12-14 Qwest Communications International, Inc. Routing information packets in a distributed network
US6968201B1 (en) * 1999-10-06 2005-11-22 Lucent Technologies, Inc. Method and apparatus for controlling reverse link interference rise and power control instability in a wireless system
KR100317271B1 (en) * 1999-11-02 2001-12-24 서평원 Traffic control method for mobile communication system
US6735447B1 (en) * 1999-12-08 2004-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Transmission power control of a mobile station
US6650904B1 (en) * 1999-12-16 2003-11-18 Ericsson Inc. Optimization of radio receiver uplink power
JP3389951B2 (en) * 2000-02-07 2003-03-24 日本電気株式会社 CDMA mobile communication system and downlink transmission power control method in the CDMA mobile communication system
JP2001320326A (en) * 2000-03-03 2001-11-16 Sony Corp Communication system, communication method and equipment
JP3805205B2 (en) * 2000-04-06 2006-08-02 株式会社エヌ・ティ・ティ・ドコモ Method and apparatus for measuring communication quality in CDMA cellular system
WO2002015430A2 (en) * 2000-08-17 2002-02-21 Siemens Aktiengesellschaft Method for controlling transmitting power in a radio system
US6985456B2 (en) * 2000-09-12 2006-01-10 Sharp Laboratories Of America, Inc. Method to reduce interference and increase effective capacity of power line networking systems
JP3848068B2 (en) * 2000-09-12 2006-11-22 株式会社エヌ・ティ・ティ・ドコモ CDMA radio transmission apparatus, CDMA radio transmission / reception system, transmission power control method for CDMA radio transmission apparatus, and transmission power control method for radio transmission apparatus in CDMA radio transmission / reception system
JP3479836B2 (en) * 2000-09-18 2003-12-15 日本電気株式会社 CDMA receiver
WO2002039603A1 (en) * 2000-11-13 2002-05-16 Mitsubishi Denki Kabushiki Kaisha Portable telephone
KR100433893B1 (en) * 2001-01-15 2004-06-04 삼성전자주식회사 A power control method in narrow band time division duplexing code division multiple access communication system and apparatus thereof
US8605686B2 (en) * 2001-02-12 2013-12-10 Qualcomm Incorporated Method and apparatus for power control in a wireless communication system
KR101069304B1 (en) * 2001-05-14 2011-10-05 인터디지탈 테크날러지 코포레이션 Channel quality measurements for downlink resource allocation
AU2006252118B8 (en) * 2001-05-14 2010-03-04 Interdigital Technology Corporation Channel quality measurements for downlink resource allocation
US6990137B2 (en) * 2001-05-17 2006-01-24 Qualcomm, Incorporated System and method for received signal prediction in wireless communications systems
US7170924B2 (en) * 2001-05-17 2007-01-30 Qualcomm, Inc. System and method for adjusting combiner weights using an adaptive algorithm in wireless communications system
US7330446B2 (en) * 2001-09-21 2008-02-12 Industrial Technology Research Institute Closed-loop power control method for a code-division multiple-access cellular system
KR100469245B1 (en) * 2001-12-07 2005-02-02 엘지전자 주식회사 Method for controlling power in forward link
JP3588087B2 (en) * 2002-04-19 2004-11-10 松下電器産業株式会社 SIR measuring apparatus and method
JP2004207840A (en) * 2002-12-24 2004-07-22 Nec Corp Method of managing radio resource, managing apparatus used therefor, base station and terminal
GB2404822B (en) * 2003-08-07 2007-07-11 Ipwireless Inc Method and arrangement for noise variance and sir estimation
JP4458251B2 (en) * 2004-07-13 2010-04-28 日本電気株式会社 Mobile communication system, transmission power control method in mobile communication system, and mobile station
US8295225B2 (en) * 2006-09-08 2012-10-23 Qualcomm Incorporated Reverse link feedback for interference control in a wireless communication system
CN101601320A (en) * 2007-01-31 2009-12-09 夏普株式会社 Mobile communication system, base station apparatus and mobile station apparatus
CN101895899B (en) * 2007-07-04 2012-09-05 上海华为技术有限公司 Method and system for controlling uplink power
CN101079659A (en) * 2007-07-04 2007-11-28 上海华为技术有限公司 Control method and system for uplink and downlink power
US9491722B2 (en) * 2007-08-10 2016-11-08 Qualcomm Incorporated Adaptation of transmit power based on channel quality
ATE482594T1 (en) * 2008-06-18 2010-10-15 Alcatel Lucent METHOD FOR PICOCELL POWER CONTROL AND CORRESPONDING BASE STATION
CN101651476B (en) * 2008-08-14 2013-02-27 华为技术有限公司 Method for limiting transmitted power of terminal and wireless access equipment
EP2420097B1 (en) * 2009-04-16 2016-01-06 Telefonaktiebolaget LM Ericsson (publ) A method of power control
US8498579B2 (en) 2009-07-20 2013-07-30 Qualcomm Incorporated Channel reuse in communication systems
CN102088760A (en) * 2009-12-08 2011-06-08 中兴通讯股份有限公司 Power control method and device of uplink in carrier aggregation system
US8483741B1 (en) 2010-05-03 2013-07-09 Qualcomm Incorporated Mitigation of inter-network interference to enable channel reuse
FR2961050B1 (en) * 2010-06-04 2012-07-20 Commissariat Energie Atomique ENERGY SAVING SCHEDULING METHOD
CN102196542B (en) 2011-05-27 2014-06-25 上海华为技术有限公司 Power control method, equipment and system
US8886203B2 (en) 2011-12-28 2014-11-11 Qualcomm Incorporated Dynamic channel reuse in multi-access communication systems
CN104105185B (en) * 2013-04-03 2018-11-27 电信科学技术研究院 Transmission power control method, apparatus and system in device-to-device communication
CN109982249B (en) * 2019-03-19 2021-01-19 海能达通信股份有限公司 Base station transmitting power adjusting method and related equipment

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595889B1 (en) * 1986-03-14 1988-05-06 Havel Christophe TRANSMISSION POWER CONTROL DEVICE IN A RADIO COMMUNICATION TRANSCEIVER STATION
JPH0773385B2 (en) * 1989-04-03 1995-08-02 三菱電機株式会社 Mobile phone equipment
US5485486A (en) * 1989-11-07 1996-01-16 Qualcomm Incorporated Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
US5265119A (en) * 1989-11-07 1993-11-23 Qualcomm Incorporated Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
FI86352C (en) * 1989-11-14 1992-08-10 Nokia Oy Ab DIGITALISKT RADIOLAENKSYSTEM OCH FOERFARANDE FOER REGLERING AV EN SAENDINGSEFFEKT I ETT DIGITALISKT RADIOLAENKSYSTEM.
US5446756A (en) * 1990-03-19 1995-08-29 Celsat America, Inc. Integrated cellular communications system
US5204970A (en) * 1991-01-31 1993-04-20 Motorola, Inc. Communication system capable of adjusting transmit power of a subscriber unit
EP0548939B1 (en) * 1991-12-26 2000-09-13 Nec Corporation Transmission power control system capable of keeping signal quality constant in mobile communication network
GB9214107D0 (en) * 1992-07-03 1992-08-12 Ncr Int Inc Power control method in a wireless communication system
US5396516A (en) * 1993-02-22 1995-03-07 Qualcomm Incorporated Method and system for the dynamic modification of control paremeters in a transmitter power control system
JP2911090B2 (en) * 1993-09-29 1999-06-23 エヌ・ティ・ティ移動通信網株式会社 Mobile communication base station device and mobile station device
US5469471A (en) * 1994-02-01 1995-11-21 Qualcomm Incorporated Method and apparatus for providing a communication link quality indication
US5469115A (en) * 1994-04-28 1995-11-21 Qualcomm Incorporated Method and apparatus for automatic gain control in a digital receiver

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100473252B1 (en) * 1996-11-27 2005-03-08 가부시끼가이샤 히다치 세이사꾸쇼 Transmission power control method and apparatus for mobile communication system
US6178194B1 (en) 1997-01-16 2001-01-23 Nec Corporation Cellular mobile telephone system
US6148216A (en) * 1997-05-21 2000-11-14 Matsushita Electric Industrial Co., Ltd. System and method for wireless communications
WO1999037111A1 (en) * 1998-01-16 1999-07-22 Ntt Mobile Communications Network Inc. Transmission power control method, mobile phone, base station, and recording medium
US6343218B1 (en) 1998-01-16 2002-01-29 Ntt Docomo Inc. Transmission power control method, mobile phone, base station, and recording medium
US6405021B1 (en) 1998-03-27 2002-06-11 Nec Corporation Method of controlling transmission power in cellular system and base station apparatus
US6405052B1 (en) 1998-05-28 2002-06-11 Nec Corporation Method for power control during call acquisition in CDMA mobile communication systems
US6330455B1 (en) 1998-07-27 2001-12-11 Nec Corporation Transmission power controller for use in mobile communication terminal equipment
WO2001001610A1 (en) * 1999-06-28 2001-01-04 Samsung Electronics Co., Ltd. Apparatus and method of controlling forward link power when in discontinuous transmission mode in a mobile communication system
US7813751B2 (en) 2000-08-09 2010-10-12 Nec Corporation Transmission power control system and method capable of saving battery consumption of mobile station and preventing connection capacity from being reduced
JP2009522955A (en) * 2006-01-05 2009-06-11 クゥアルコム・インコーポレイテッド Power supply control for service provision sector command
JP2009527198A (en) * 2006-02-17 2009-07-23 アルカテル−ルーセント ユーエスエー インコーポレーテッド Reverse link power control method
JP2009527197A (en) * 2006-02-17 2009-07-23 アルカテル−ルーセント ユーエスエー インコーポレーテッド Reverse link power control method
JP2014003620A (en) * 2006-02-17 2014-01-09 Alcatel-Lucent Usa Inc Methods of reverse link power control
JP2012521173A (en) * 2009-03-17 2012-09-10 インターデイジタル パテント ホールディングス インコーポレイテッド Method and apparatus for power control of sounding reference signal (SRS) transmission
US10298377B2 (en) 2009-03-17 2019-05-21 Interdigital Patent Holdings, Inc. Method and apparatus for power control of sounding reference signal (SRS) transmission
US11323234B2 (en) 2009-03-17 2022-05-03 Interdigital Patent Holdings, Inc. Method and apparatus for power control of sounding reference signal (SRS) transmission
US11824816B2 (en) 2009-03-17 2023-11-21 Interdigital Patent Holdings, Inc. Method and apparatus for power control of sounding reference signal (SRS) transmission

Also Published As

Publication number Publication date
KR950035126A (en) 1995-12-30
EP0682418B9 (en) 2010-09-01
CA2149095C (en) 1998-08-04
US5566165A (en) 1996-10-15
EP0682418A3 (en) 1998-01-21
EP0682418B2 (en) 2008-02-27
DE69533818T3 (en) 2008-07-24
JP2993554B2 (en) 1999-12-20
CN1187908C (en) 2005-02-02
DE69533818D1 (en) 2005-01-05
CN1296345A (en) 2001-05-23
CA2149095A1 (en) 1995-11-13
EP0682418B1 (en) 2004-12-01
CN1082771C (en) 2002-04-10
CN1126930A (en) 1996-07-17
KR0143837B1 (en) 1998-08-01
DE69533818T2 (en) 2005-10-27
EP0682418A2 (en) 1995-11-15

Similar Documents

Publication Publication Date Title
JP2993554B2 (en) Transmission power control method and communication device using the transmission power control method
KR100233981B1 (en) Transmitting power control method and device thereof
KR100874101B1 (en) Method and apparatus for controlling transmission power while in soft handoff
Ariyavisitakul et al. Signal and interference statistics of a CDMA system with feedback power control
JP3938186B2 (en) Adaptive power control system for transmitter for spread spectrum communication
US6587696B1 (en) Power control technique utilizing forward pilot channel
US5535238A (en) Spread spectrum adaptive power control communications system and method
KR100268145B1 (en) Method of controlling transmitting power of a base station in a cdma mobile communication system
JP2982856B2 (en) Transmission power control method and communication device using the transmission power control method
EP0976206A1 (en) Forward link power control in a cellular system using n t/i 0 values
WO2000057574A1 (en) Combined closed loop/open loop power control in a time division duplex communication system
KR100529424B1 (en) Transmitting device and transmitting method
US6661783B1 (en) CDMA transmission apparatus
KR19990088557A (en) Spread spectrum communication system and base station thereof
JP3421210B2 (en) Signal transmission method and signal transmission device in CDMA mobile communication system
JP3581049B2 (en) Frame configuration method, frame configuration device, frame configuration, transmission power control method, and wireless station
JPH09284212A (en) Spread spectrum communication system
JP3112858B2 (en) Test equipment for wireless base station equipment
Yu et al. The effect of dynamic range on an open-loop power controlled CDMA system
KR20060116011A (en) Power control for high-speed packet data transmission
JPH0865737A (en) Mobile communication equipment
JP2003018092A (en) Communication terminal and radio communication method

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071022

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081022

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091022

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101022

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101022

Year of fee payment: 11

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: R3D02

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101022

Year of fee payment: 11

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: R3D04

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111022

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121022

Year of fee payment: 13

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131022

Year of fee payment: 14

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term